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(11)

EP 3 898 753 A1

(12)

(43) Date of publication: 27.10.2021 Bulletin 2021/43 (21) Application number: 19818071.3 (22) Date of filing: 12.12.2019

(51) International Patent Classification (IPC):  C08G 18/79(2006.01) C08G 18/09(2006.01) C08G 18/32(2006.01) C08G 18/02(2006.01) C08G 18/22(2006.01) (52) Cooperative Patent Classification (CPC): C08G 18/092; C08G 18/755; C08G 18/4833; C08G 18/225; C08G 18/73; C08G 18/3206; C08G 18/7664; C08G 18/758; C08G 18/022; C08G 18/792 (86) International application number: PCT/EP2019/084783 (87) International publication number: WO 2020/126778 (25.06.2020 Gazette 2020/26)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 19.12.2018 WO PCT/CN2018/121966 10.01.2019 EP 19151199 (71) Applicant: Covestro Intellectual Property GmbH & Co. KG 51373 Leverkusen (DE)	(72) Inventors: DENG, Yan Shanghai Changning District 200050 (CN) HOCKE, Heiko 51375 Leverkusen (DE) ZHAO, Dongbo Shanghai Pudong 201206 (CN) CHEN, Ruqi Shanghai 200237 (CN) (74) Representative: Levpat  c/o Covestro AG Gebäude K12 51365 Leverkusen 51365 Leverkusen (DE)